Dark Servant

The Dark Servant is an artifact in Hexen. It looks like a small Maulotaur doll. When thrown, it can become a Maulotaur who will fight for the player. The Maulotaur disappears again after a little while. If it lands in a place where there is not enough room for the Maulotaur to spawn, the artifact will simply float there, where it can be picked up again.

Appearance statistics
In the IWADs the dark servant is first encountered on these maps per skill level:

The IWADs contain the following numbers of dark servants per skill level:

Other games
Hexen II has a similar item called "Stone of Summoning".